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I have a 92 AUDI 80 Euro spec car. When I am driving after I hit 2000 rpm or sometimes less the car still revs like that when I pull the clutch out. Sometimes while idling in an intersection the rpm's just climb on its own, eventually it gets to 3000 rpm. If I pump the pedal sometimes it goes back to normal idle (1000 rpm) I have a fuel injected 5 sp. 4 cyl 2.0 liter. Someone told me it sounds like an injector sensor? What does it look like? is this it? where can I find it on the car? If I replace it, is there calibration required?